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Method for producing calcium carbide

A production method and calcium carbide technology, which are used in the smelting of calcium carbide, and the field of smelting calcium carbide with pulverized coal instead of coke, to achieve the effects of shortening reaction time, large surface area, and facilitating rapid generation

Inactive Publication Date: 2008-05-07
李书堂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in actual production at present, only a small amount of pulverized coal is added to the coke, and the problem is not fundamentally solved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0012] Crush coal powder into 120-mesh fine powder on a ball mill, mix it with quicklime according to the weight ratio of 1:0.8, add an appropriate amount of water and mix evenly, press it into a square honeycomb block with a diameter of 20mm, dry it naturally, and send it to Smelting at 2300°C for 10 minutes in an electric arc furnace to obtain calcium carbide products.

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Abstract

The invention relates to a production method of calcium carbide, which takes coal powder and calcium oxide as raw materials. According to the method, the coal powder is crashed to 120 meshes, and then mixed with the calcium oxide at the weight rate of 1:0.8 to 1. A certain amount of water is added into the mixture which then can be stirred to be even and compressed into cubic honeycomb blocks; and then the cubic honeycomb blocks are sent into an electric-arc furnace for smelting the calcium carbide after airing water. The invention crashes the coal powder into a nanometer particle size, thereby ensuring the cubic honeycomb blocks to have a comparatively large surface area, improving the reaction activation energy and being good for the rapid generation of the calcium carbide. The production method of the calcium carbide of the invention not only reduces reaction temperature and shortens reaction time, but also extends the service life of the electric arc furnace.

Description

technical field [0001] The invention belongs to the technical field of metallurgy and relates to a method for smelting calcium carbide, in particular to a method for smelting calcium carbide with coal powder instead of coke. Background technique [0002] The currently known calcium carbide smelting method is the electric furnace method, that is, quicklime and coke are used as raw materials and added to the electric arc furnace together, according to the equation CaO+3C=CaC 2 + CO high temperature smelting to produce calcium carbide. This reaction is a strongly endothermic process that can only proceed at a significant rate at temperatures ≥ 1600°C. There are two problems to be solved in above-mentioned production method: [0003] First, the cost of producing calcium carbide with coke as a reducing agent is relatively high, and all countries in the world are working hard to find a reducing agent that can replace coke. Coal powder is undoubtedly an ideal choice, but the tra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/32C01B32/942
Inventor 李书堂
Owner 李书堂
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